How do I manage multiple pc for family

I have about 10 devices in my house. They vary in type but run on Linux, Win10, Android or Raspberry Pi.
Its become difficult to detect errors / alerts on all of these devices.

I would like to use just one device to monitor all my devices. I am able to easily do this when it comes to my home network, but am coming up short with system information.

I searched the net and was only able to find the software called Pulseway. Is there an option source version or something similar to this?